19674270225 has 63 divisors (see below), whose sum is σ = 36612648363. Its totient is φ = 10482845040.

The previous prime is 19674270197. The next prime is 19674270227. The reversal of 19674270225 is 52207247691.

The square root of 19674270225 is 140265.

It is a perfect power (a square), and thus also a powerful number.

19674270225 is a `hidden beast` number, since 1 + 96 + 74 + 270 + 225 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7082737281 + 12591532944 = 84159^2 + 112212^2 .

It is not a de Polignac number, because 19674270225 - 2¹³ = 19674262033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (19674270227) by changing a digit.

It is a polite number, since it can be written in 62 ways as a sum of consecutive naturals, for example, 18935256 + ... + 18936294.

Almost surely, 2^19674270225 is an apocalyptic number.

19674270225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19674270225 is the 140265-th square number.

19674270225 is the 70133-rd centered octagonal number.

It is an amenable number.

19674270225 is a deficient number, since it is larger than the sum of its proper divisors (16938378138).

19674270225 is an frugal number, since it uses more digits than its factorization.

19674270225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106 (or 1047 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 19674270225 in words is "nineteen billion, six hundred seventy-four million, two hundred seventy thousand, two hundred twenty-five".